diff --git a/weboob/tools/application/formatters/json.py b/weboob/tools/application/formatters/json.py
index ea2df55c..e9ae2350 100644
--- a/weboob/tools/application/formatters/json.py
+++ b/weboob/tools/application/formatters/json.py
@@ -36,7 +36,7 @@ class Encoder(json.JSONEncoder):
                 dct = obj.to_dict()
             except AttributeError:
                 return str(obj)
-            for z in dct:
+            for z in dct.itervalues():
                 return z